Using a colander or strainer, wash the quinoa 2 to 3 times. Washing the quinoa will remove bitterness from it.
Add the drained quinoa to the instant pot inner pot
Add water and close the instant pot with its lid.
Start the instant pot in manual or pressure cook mode and cook for 1 minute.
Once the instant pot beeps, wait for 5 minutes and manually release the pressure.
Now start the instant pot in saute mode and add coconut milk, sugar to it.
Let it simmer for 5 minutes or more till it reaches your desired consistency.
Switch off the instant pot and serve the quinoa pudding, warm or chilled!